Abstract
The 9-acridinealdehyde acetal of poly(vinyl alcohol) [abbreviated as acetal (I)] and the 3-pyrenealdehyde acetal of poly(vinyl alcohol) [abbreviated as acetal (II)] were synthesized from poly (vinyl alcohol) and 9-acridinealdehyde or 3-pyrenealdehyde, with hydrochloric acid as a catalyst, in dioxane—water binary solvents at an elevated temperature.The degree of acetalization did not exceed 34.2% and 54.15% for acetals (I) and (II), respectively. The statistical calculation of the maximum degree of acetalization with polyacenealdehydes was made by extending the method of Flory for the formalization of poly (vinyl alcohol); here the steric hindrance caused by the bulky polyacene ring was also taken into account. The results of the calculation agreed fairly well with the experimental results.The permittivities of the films of the acetylated acetals (I) and (II) and their chargetransfer complexes with tetracyanoquinodimethane(TCNQ) were measured at room temperature. It was found that the permittivities of both of the acetylated acetals (I) and (II) increased by complexation with TCNQ.
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Oshiro, Y., Yokoyama, M., Shirota, Y. et al. Syntheses and Dielectric Properties of the 9-Acridinealdehyde Acetal of Poly(vinyl alcohol) and the 3-Pyrenealdehyde Acetal of Poly(vinyl alcohol). Polym J 6, 27–32 (1974). https://doi.org/10.1295/polymj.6.27
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DOI: https://doi.org/10.1295/polymj.6.27